blob: c2b9b4bdec00dec88b0b81094c659780c5c63b95 [file] [log] [blame]
Richard Purdiec587e4a2007-02-06 21:29:00 +01001#ifndef _ARM_KEXEC_H
2#define _ARM_KEXEC_H
3
4#ifdef CONFIG_KEXEC
5
6/* Maximum physical address we can use pages from */
7#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
8/* Maximum address we can reach in physical address mode */
9#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
10/* Maximum address we can use for the control code buffer */
Thomas Kunze5ce94e92008-02-24 17:59:34 +010011#define KEXEC_CONTROL_MEMORY_LIMIT (-1UL)
Richard Purdiec587e4a2007-02-06 21:29:00 +010012
Huang Ying163f6872008-08-15 00:40:22 -070013#define KEXEC_CONTROL_PAGE_SIZE 4096
Richard Purdiec587e4a2007-02-06 21:29:00 +010014
15#define KEXEC_ARCH KEXEC_ARCH_ARM
16
Richard Purdie4cd9d6f2008-01-02 00:56:46 +010017#define KEXEC_ARM_ATAGS_OFFSET 0x1000
18#define KEXEC_ARM_ZIMAGE_OFFSET 0x8000
19
Richard Purdiec587e4a2007-02-06 21:29:00 +010020#ifndef __ASSEMBLY__
21
Mika Westerberg24b776b2010-05-10 09:22:14 +010022/**
23 * crash_setup_regs() - save registers for the panic kernel
24 * @newregs: registers are saved here
25 * @oldregs: registers to be saved (may be %NULL)
26 *
27 * Function copies machine registers from @oldregs to @newregs. If @oldregs is
28 * %NULL then current registers are stored there.
29 */
Richard Purdiec587e4a2007-02-06 21:29:00 +010030static inline void crash_setup_regs(struct pt_regs *newregs,
Mika Westerberg24b776b2010-05-10 09:22:14 +010031 struct pt_regs *oldregs)
32{
33 if (oldregs) {
34 memcpy(newregs, oldregs, sizeof(*newregs));
35 } else {
Dave Martincd849ae2010-12-01 18:05:14 +010036 __asm__ __volatile__ (
37 "stmia %[regs_base], {r0-r12}\n\t"
38 "mov %[_ARM_sp], sp\n\t"
39 "str lr, %[_ARM_lr]\n\t"
40 "adr %[_ARM_pc], 1f\n\t"
41 "mrs %[_ARM_cpsr], cpsr\n\t"
42 "1:"
43 : [_ARM_pc] "=r" (newregs->ARM_pc),
44 [_ARM_cpsr] "=r" (newregs->ARM_cpsr),
45 [_ARM_sp] "=r" (newregs->ARM_sp),
46 [_ARM_lr] "=o" (newregs->ARM_lr)
47 : [regs_base] "r" (&newregs->ARM_r0)
48 : "memory"
49 );
Mika Westerberg24b776b2010-05-10 09:22:14 +010050 }
51}
Richard Purdiec587e4a2007-02-06 21:29:00 +010052
Eric Cooper868d172b2011-02-02 17:16:09 -050053/* Function pointer to optional machine-specific reinitialization */
54extern void (*kexec_reinit)(void);
55
Richard Purdiec587e4a2007-02-06 21:29:00 +010056#endif /* __ASSEMBLY__ */
57
58#endif /* CONFIG_KEXEC */
59
60#endif /* _ARM_KEXEC_H */